Kennedy Diesel Lift Pump and Wiring Harness [Archive] - Diesel Place : Chevrolet and GMC Diesel Truck Forums

: Kennedy Diesel Lift Pump and Wiring Harness


YZF1R
05-21-2004, 05:32 PM
Well, everything works as advertised. Very nice kit. Wiring, top of the line hose clamps, connectors, etc., etc. All the usual Kennedy Diesel details. All items were mounted in the same places as John recommends or as shown in the pictures he sent me. Truck does seem to start a little faster and idle smoother. Time will tell if anything else but I’m sure it can do nothing but good to have it on there. VERY nice to push a button to prime fuel filters. (Changed those out also.) Key must be "ON" to use manual primer.


Things I added - 10 amp inline fuse for pump power. 3 amp add a circuit fuse for control power. All connections soldered and shrink wrapped.


Some things to think about when installing - I used the 15 amp glow plug/intake heater fuse for switched control power, adding the add a circuit fuse holder. Note: When standing on the drivers side looking into the fuse box at that fuse, the terminal on the left side of the fuse is the hot side. The wire for the add a circuit fuse holder comes out toward the rear of the truck in this position. If it is installed the other way, the power for the added fuse will go straight out that leg and not through the fuse. The reason I’m saying this is so you don’t have to remove the 15 amp fuse and turn on the key to check which side is hot. As I figured, when I did this it tripped the SES lamp because the computer saw that the circuit was not working. No real big deal though as the light went out after several key ons’ with the fuse back in. Also, don’t forget a ¼ to ½ inch bushing to install the oil pressure sender in the top most plug on the oil filter housing. There are 3 to choose from of different sizes. I used this one as that is the one John recommended. Probably as that is the one most out of harms way for the sender. The fuel lines - Make sure you get the deep ½ inch quick disconnect as someone mentioned the short ones won’t work. These were not easy to remove. Once you do get them though the line just comes off like nothing. I understand how they work and what to do to remove them but it was still a pain in the butt. I did not drop the tank, but did bend the shield down out of the way. It is not real easy to get your hands up in there to put the new line on. I would not try with just one hand, pushing on the fuel hose to get it over the lip on the fuel sender. It’s plastic and if you snap it off.............(200 plus dollars I hear, and dropping the tank). Also, I would highly recommend getting the rear of the truck off the ground (using jack stands) as I really needed this extra room. As it was, my chin was against the drive shaft and an exhaust hanger was sticking in the back of my neck.


I wanted to get the hardest done first, so I did the pump and lines followed by the oil pressure sender and then electrical. Can you do this? Yes, but it was not a lot of fun. (Fuel line.) Lowering the tank or having the truck on a lift would probably make this a lot easier. You could make it much easier by just cutting the fuel line but I thought I had better go right to the tank as John recommends. If I cut the line instead, I would be forever wondering if the stupid O-rings in the quick connects were leaking with age and if I were sucking air.


Overall, a very nice set up and I’m pleased I have it in.


Steve Edited by: YZF1R

YZF1R
05-21-2004, 06:51 PM
I should note the wiring harness I recieved is a pre-production unit. Production units may have more refinements.


Steve

jbplock
05-22-2004, 08:42 AM
Steve,
Excellent post http://www.dieselplace.com/forum/smileys/Clap.gif…especially your description of removing the OEM fuel line from the tank.. I did mine the way you described and until you experience doing it, it’s hard to appreciate what a pain it is. http://www.dieselplace.com/forum/smileys/Angry.gif I cut an access slot (http://community.webshots.com/photo/67970835/72255641wBdYMf) (with cover (http://community.webshots.com/photo/67970835/72257196KTCvMU)) in the tank shield but looking back I should have just dropped the tank …would have made it a lot easier… Starting out with the right QD tool (http://community.webshots.com/photo/67970835/72256238bjrjGJ) and knowing that the tool had to line up with the 4 tabs inside the fitting (http://community.webshots.com/photo/67970835/72256238bjrjGJ) would also help. I believe some one posted that the 04’s are easier to get to (??)..
Also regarding the Litlefuse add-a-circuit (http://community.webshots.com/photo/77018086/143154203ZUDYIZ), I could be wrong (often the case) but I think the unit is designed so that the feed for the two fuses is tied together. So, if the add-a-circuit is oriented such that the end with the fuses tied together is on the hot side, both fuses (OEM and added) are fed by the hot side. If the add-a-circuit is inserted opposite to this, then the (tapped) added circuit is fed from the fused side of the OEM circuit.
http://www.dieselplace.com/forum/smileys/Geek.gif
Edited by: jbplock

YZF1R
05-22-2004, 10:25 AM
Thanks for the post. You know, I have another add a fuse. I'll have to check it out with a meter.


I don't mean for the post to sound negative. The product is excellent. It's just the install, or rather getting the old fuel line off. I'm sure that a lot of people here are not real mechanical and I just wanted to make sure the average Joe isn't stuck with his truck not running and in pieces in his driveway or something broken.


Another point of caution, when loosening the nut on the power stud on the red jumper box, be darn careful it doesn't break loose and your wrench swings into that ground stick. You could weld the wrench on and really have a problem. I wrapped a rag around the ground stick just in case.


It took about 5 hours, but I really took my time thinking everything out before I made a move.


Another point, watch getting the fuel line out once disconnected. Don't just yank on it. Mine was taped to the return line and you also don't want to get the fuel level sensor wires caught with it and rip them off.


Of course, if I did it again, it would go a lot smoother.


Steve


P.S. The spell checker is great!

YZF1R
05-22-2004, 12:34 PM
I checked the add-a-circuit. The hot side would be the opposite side where the wire comes out.


Steve


On edit: This would be for the fuse you are adding. The original fuse would still work with the add-a-fuse installed either way.Edited by: YZF1R

Mackin
05-22-2004, 12:53 PM
Yes good post ....


Where and what was used to mount the Pump ?? What are the specs GPH and pressure if you don't mind ??


Mac

YZF1R
05-22-2004, 01:31 PM
Thank you Mackin. I don't know what the spec's are. I THINK it was said somewhere that it keeps 5 or 6 psi at idle going to very little at full load and RPM. It was an AC/Delco pump, looking like one a 6.5L. I'm sure John would know. This was mainly to reduce air in the fuel.


So far as mounting the pump, it is on the end of the OE fuel line on top and to the rear of the fuel cooler. The one end of the pump is through the plastic OE fuel line clip. I wasn't too keen on this at first, but it really does stay put. No rattles either. John has pictures of this. I also tie wrapped it and covered the fuel line from there back to the tank. I have an OE bracket that I was going to mount on the frame but the fuel lines are too big to pass through it. I saw it on a 4500 chassis cab where I think the pump was used to transfer fuel from the rear tank to the front. It was about 10 bucks.


I think I saw a post where John said he is looking into a performance pump. I don't remember any pressure numbers but I assume a large GPH. You would be able to use it for your Duramax and if the truck is parked for the weekend it could also be used to pump out a mine shaft or something like that.http://www.dieselplace.com/forum/smileys/Big Smile.gif


Steve

Kennedy
05-23-2004, 01:12 PM
FYI:





You are supposed to remove both negative battery cables as first order of business in any repair project, especially electrical. I cheat on this one as well, but I've paid the price a few times...





The B+ wire is fuselink protected in this harness also.

YZF1R
05-23-2004, 02:01 PM
Woops, I didn't even think about disconnecting the batteries. Guess I was lucky. Also, good deal on the fuselink. I wasn't aware of that. Should have figured you had that taken care of.


Steve

JEBar
05-23-2004, 02:05 PM
just returned from a long weekend trip, have put just over 600 miles on our truck since adding the fuel pump ... ZERO air related Mega/air problems since the addition of John's lift pump ..http://www.dieselplace.com/forum/smileys/Clap.gif.. have actually opened the bleed valves on both filters a couple of times and been delighted to see fuel instantly sput out under pressure ... had my mechanic to install the lift pump near the top, front, inside corner of fuel tank in a position where if/when it should need to be changed I can do so without having to drop the fuel tank .. he secured it with a couple of very thick wire ties and mounted a rubber pad between it and the frame where put it ... leaving this coming Saturday (May 29th) on an 8,000+ mile cross country tow and am really pleased to have it in place http://www.dieselplace.com/forum/smileys/Big Smile.gif


Jim

TraceF
12-24-2004, 08:19 AM
What ever happened to the Kennedy plug and play wiring harness?

HBruns
12-26-2004, 09:08 PM
Bumping to top....

I'm getting more & more interested in a lift pump.

BassinRVer
01-07-2005, 01:01 PM
JK says maybe in a few weeks for plug and play harness.

Lakedaisy
01-07-2005, 07:14 PM
JK says maybe in a few weeks for plug and play harness.
Hasn't it been a 'couple of weeks' for going on 2 years? ):h